Hyundai Energy — South Korea
HiISS 425W E Max
The Hyundai Energy HiISS 425W E Max is a 425W N-Type TOPCon solar panel with 20.6% efficiency. Backed by a 25-year warranty.
Standard Tier
425W
Wattage
20.6%
Efficiency
N-Type TOPCon
Cell Type
25 years
Warranty
Full Specifications
- Brand
- Hyundai Energy
- Model
- HiISS 425W E Max
- Series
- HiISS
- Wattage
- 425W
- Module Efficiency
- 20.6%
- Cell Type
- N-Type TOPCon
- Dimensions
- 66-80" x 39-41"
- Weight
- 48 lbs
- Warranty
- 25 years
- Est. Price Per Watt
- $2.68
- Est. 7kW System Cost
- $18,760
- Est. 10kW System Cost
- $26,800
- Temperature Coefficient
- -0.25%/°C
- Bifacial
- No
- Origin
- South Korea
- FEOC Status
- check
Other Hyundai Energy Panels
| Model | Wattage | Efficiency | Cell | $/W |
|---|---|---|---|---|
| HiISS 455W D | 455W | 21.7% | PERC | $3.01 |
| HiISS Plus 455W D | 455W | 21.7% | PERC | $3.01 |
| Green 455W D | 455W | 21.7% | PERC | $3.01 |
| HiISS 450W C All-Black | 450W | 21.5% | N-Type TOPCon | $2.95 |
| HiISS Plus 450W C All-Black | 450W | 21.5% | N-Type TOPCon | $2.95 |
Similar Wattage Panels (Competitors)
| Panel | Wattage | Efficiency | $/W |
|---|---|---|---|
| Maxeon Maxeon 3 455W E Pro | 455W | 23.5% | $4.72 |
| Maxeon Maxeon 6 455W E Pro | 455W | 23.5% | $4.72 |
| Maxeon Maxeon 7 455W E Pro | 455W | 23.5% | $4.72 |
| Maxeon Maxeon Air 455W E Pro | 455W | 23.5% | $4.72 |
Frequently Asked Questions
How much does a 425W Hyundai Energy HiISS 425W E Max cost?
The Hyundai Energy HiISS 425W E Max costs approximately $1139 per panel ($$2.68/W). A typical 7kW system using this panel would cost around $18,760 before incentives.
⚠ The 30% Federal Solar Tax Credit (48E/ITC) expired July 4, 2026.
Selecting 30% ITC assumes you began construction before this deadline. Most new purchases no longer qualify.Learn about your options after the deadline →
Is the Hyundai Energy HiISS 425W E Max a good solar panel?
The Hyundai Energy HiISS 425W E Max has 20.6% efficiency and a 25 years warranty, placing it in the standard tier. This is a solid mid-range panel suitable for most residential installations.
How many Hyundai Energy HiISS 425W E Max panels do I need?
For a typical 7kW residential system, you'd need approximately 17 panels. For a 10kW system, plan for about 24 panels. The exact number depends on your roof space, energy usage, and local sun hours.